Stop losing money to forgotten paper gift cards and expired retail coupons by centralizing every voucher, loyalty barcode, and store credit inside VoucherVault, a self-hosted digital wallet accessible from any browser or mobile device. Point your phone camera at physical cards during item creation to scan 1D barcodes and 2D QR codes with automatic format detection, or upload original PDF receipts and image attachments directly to each entry. At the checkout register, pull up high-contrast QR codes and scannable barcodes instantly, even inside underground stores without cellular reception thanks to the manual 48-hour offline caching mode. Gift card balances update automatically as you log individual partial redemptions in the per-item transaction ledger. Configurable Apprise notification rules alert you 30 days and 7 days before any voucher expires across Telegram, Discord, Gotify, Ntfy, or email. Households and teams can share specific cards between accounts while keeping personal items private, and administrators can enable OpenID Connect single sign-on for frictionless login. Multi-currency conversion automatically calculates portfolio totals across international vouchers. A built-in REST API endpoint even exposes live portfolio counts and value statistics directly to Home Assistant dashboards. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. GPL-3.0 licensed.